DE60126479D1 - Multi-valued modulation device - Google Patents

Multi-valued modulation device

Info

Publication number
DE60126479D1
DE60126479D1 DE60126479T DE60126479T DE60126479D1 DE 60126479 D1 DE60126479 D1 DE 60126479D1 DE 60126479 T DE60126479 T DE 60126479T DE 60126479 T DE60126479 T DE 60126479T DE 60126479 D1 DE60126479 D1 DE 60126479D1
Authority
DE
Germany
Prior art keywords
modulation device
valued modulation
valued
modulation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE60126479T
Other languages
German (de)
Other versions
DE60126479T2 (en
Inventor
Katsuhiro Shimizu
Kazuyuki Ishida
Yukio Kobayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of DE60126479D1 publication Critical patent/DE60126479D1/en
Application granted granted Critical
Publication of DE60126479T2 publication Critical patent/DE60126479T2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/503—Laser transmitters
    • H04B10/504—Laser transmitters using direct modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/516—Details of coding or modulation
    • H04B10/54—Intensity modulation
    • H04B10/541—Digital intensity or amplitude modulation

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
DE60126479T 2001-05-08 2001-10-04 Multi-valued modulation device Expired - Lifetime DE60126479T2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001137126A JP4744720B2 (en) 2001-05-08 2001-05-08 Multilevel modulator
JP2001137126 2001-05-08

Publications (2)

Publication Number Publication Date
DE60126479D1 true DE60126479D1 (en) 2007-03-22
DE60126479T2 DE60126479T2 (en) 2007-11-15

Family

ID=18984279

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60126479T Expired - Lifetime DE60126479T2 (en) 2001-05-08 2001-10-04 Multi-valued modulation device

Country Status (4)

Country Link
US (1) US7058313B2 (en)
EP (1) EP1257078B1 (en)
JP (1) JP4744720B2 (en)
DE (1) DE60126479T2 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4648093B2 (en) * 2005-05-31 2011-03-09 株式会社日立製作所 Optical transmission device and integrated circuit device
JP4849632B2 (en) * 2007-06-18 2012-01-11 日本電信電話株式会社 Optical transmission method, encoding method, optical transmission system, and optical transmitter
JP4925334B2 (en) * 2007-11-13 2012-04-25 日本電信電話株式会社 Optical transmission system
JP5014303B2 (en) * 2008-10-09 2012-08-29 日本電信電話株式会社 Optical transmission method and optical transmission system
JP5261164B2 (en) * 2008-12-24 2013-08-14 日本電信電話株式会社 Optical transmission system
JP5264521B2 (en) 2009-01-16 2013-08-14 三菱電機株式会社 Optical transmitter
JP2011022479A (en) * 2009-07-17 2011-02-03 Mitsubishi Electric Corp Multi-value optical transmitter
JP5482351B2 (en) * 2010-03-19 2014-05-07 富士通株式会社 Light modulation apparatus and light modulation method
JP5263205B2 (en) * 2010-03-19 2013-08-14 富士通株式会社 Light modulation apparatus and light modulation method
JP5845514B2 (en) * 2011-10-04 2016-01-20 学校法人玉川学園 ENCRYPTED OPTICAL TRANSMITTER AND RECEPTION DEVICE, AND ENCRYPTED COMMUNICATION SYSTEM
JP5375991B2 (en) * 2012-02-20 2013-12-25 富士通株式会社 Signal input detection device for detecting presence / absence of optical signal input
JP2014171016A (en) * 2013-03-01 2014-09-18 Nec Corp Optical transmission system, control method thereof, and program
US9705598B2 (en) * 2014-04-03 2017-07-11 Commscope, Inc. Of North Carolina Methods and systems for reducing optical beat interference via polarization diversity in FTTx networks
JP6291361B2 (en) * 2014-06-18 2018-03-14 日本電信電話株式会社 Optical access system, termination device, in-home device, and optical access method
CN104506239B (en) * 2014-11-28 2017-06-27 北京百度网讯科技有限公司 Optical module and the information transferring method for optical module
CN105721063B (en) * 2016-02-24 2018-04-20 烽火通信科技股份有限公司 A kind of the light carrier means of communication and system based on VOA modulation

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3714437A (en) * 1970-08-14 1973-01-30 Bell Telephone Labor Inc Optical communication system with pcm encoding with plural discrete unequally spaced intensity levels
IT1117071B (en) * 1977-09-05 1986-02-10 Cselt Centro Studi Lab Telecom DEVICE TO TRANSMIT MULTI-LEVEL SIGNALS ON OPTICAL FIBER
JPS5737941A (en) * 1980-08-13 1982-03-02 Fujitsu Ltd Optical output circuit
JPS627183A (en) * 1985-07-03 1987-01-14 Nec Corp Light output stabilizing circuit of semiconductor laser
JPS635633A (en) * 1986-06-25 1988-01-11 Nec Corp Optical multivalued communication system
JPH04132428A (en) * 1990-09-25 1992-05-06 Canon Inc Optical communication system and receiver used therein
DE4341408A1 (en) * 1993-12-04 1995-06-08 Sel Alcatel Ag Optical system for the transmission of a multi-stage signal
US6026368A (en) * 1995-07-17 2000-02-15 24/7 Media, Inc. On-line interactive system and method for providing content and advertising information to a targeted set of viewers
JPH09181682A (en) * 1995-12-26 1997-07-11 Fujitsu Ltd Driving circuit for light modulator, and light transmitter
JP4108254B2 (en) * 2000-07-11 2008-06-25 富士通株式会社 Optical transmitter and optical transmission system
US6459521B1 (en) * 2000-08-28 2002-10-01 Agere Systems Guardian Corp. Electroabsorption modulator integrated distributed feedback laser transmitter
JPWO2002033921A1 (en) 2000-10-13 2004-03-04 三菱電機株式会社 Optical transmission device and optical transmission method

Also Published As

Publication number Publication date
EP1257078B1 (en) 2007-02-07
JP4744720B2 (en) 2011-08-10
DE60126479T2 (en) 2007-11-15
EP1257078A3 (en) 2005-12-21
JP2002333603A (en) 2002-11-22
US20020167705A1 (en) 2002-11-14
US7058313B2 (en) 2006-06-06
EP1257078A2 (en) 2002-11-13

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)